Grain-harvester.



10.732,219. f l -PATBNTBD n'IN'f.s J,19o3.y

G. L. PHBLPS.

GRAIN HARVESTER.-

APPLIOATION FILED DEU. 29, 1902.

N0 MODEL.

lUNITED STATES 'Patentedd'une 30, 1903e PATENT OFFICE,

GEORGE L. PHELPS, OF CHICAGO, ILLINOIS, ASSIGNOR TO. THE PLANO MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORA- TION OF ILLINOIS.

GRAIN-HARVESTER.

SPECIFICATION forming part Of Letters Patent NO. 732,219,(Ia17ed J' une 30, 1903.

Application filed December 29, 1902. Serial No. 136,997. (No model.)

To all whom, it may concern: Be it known that -LGnoRGE L. PHnLPs, a citizen of the United States, residing at Chicago, in thecounty of Cook and State of Illinois, temporarily at Mason City, Iowa, have invented certain new and useful Improvements in Grain-Harvesters, of which the fol lowing is a specification. v i Myinvention is concerned with an improvement in the construction of grain-binding mechanism of the type shown in the patent to Stewart, No. 568,810, dated October 6, 1896, which is designed to make the same more efficient in its operation, as Well as more durable. To illustrate my invention, I annex hereto a sheet of drawings in which theA figure represents a Vertical section through said binding mechanism, taken adjacent to and lookingat the cam side of the cam which controls the operation of the binding mechanism. f

a is the internally-toothed cam-wheel, rotated once by the gear-pinion b when the binding mechanism is released for 'operation This cam-wheel is provided with the mutilated circular ange c, with which the antifriction-roller d on the end of the arm e cooperates. The arm e is secured on the end of the trip-stop rock-shaft f, which carries the customary presser-bar g, whose movement when the gavel is formed rocks the shaft and starts the bindingmechanism. The roller d when the binding mechanism is at rest coperates with the end h of the spring-pressed lever j, which thus holds the presser-bar and trip-stop yieldingly in their inoperative position. As these levers have lbeen previously constructed and located a lever of the second class was employed, ulcrumed to the under side of the flange c at about the point 7e, with its other end Vlocated in the same position. The helically-coiled expanding spring was located intermediate its ends and extended radially from the lever toward the hub, so that its length was necessarily limited to less than the distance between the flange c and the hub l of the cam-wheel. This prevented the employment of a spring of as great a resiliency and capacity as was desired and also causedtoo much of a rebound to the rock-shafu'asv the thrust of the spring was too effective, as with the aforesaid customary arrangement the spring exerted all its force against the roller d. In my improvement I employ a lever of the first class, which I fulcrum near the hub Zon the pin m. The other end has an aperture n therein, (shown in dotted lines,) through which passes the bolt o. To hold the bolt in position and to form a stationary abutment for the helically-coiled expanding spring p, surrounding the bolt 0, to work against, I preferably form a substantially radial flange q, extending from the hub Z to the liange c and havingan oset portion r, which is parallel to the adjacent end of the leverj and has the aperture s therein, (indicated in dotted lines,) through which the bolt 0 also passes. The nut t, screwed onto the end of the bolt, serves to hold it in place, as Well as to regulate the tension of the spring p as may be desired.

By the construction herein shown and described it will be seen that I have overcome the difficulties of the prior construction set out, inasmuch as I am enabled to employ a spring of twice the length possible before.

The interposed lever is so placed that the thrust of the spring is oblique to the roller instead of directly against it, as heretofore, thus enabling me to reduce the tendency to rebound, which has heretofore caused some diiiiculty in the operation of these devices.

While I have shown my invention as ernbodied in the form which I at present consider best adapted to carry out its purposes, it will he understood that it is capable of some modifications and that I do not desire to be limited in the interpretation of the following claims, except as may be necessitated by the state of the prior art.

What I claim as new,land desire to secure by Letters Patent of the United States, is-

l. In a binding mechanism, the combination with the cam-Wheel having the mutilated circula-1' Iiange thereon, of the trip-stop'shaft having the arm Whose-end coperates with said flange, the lever pivoted to said camwheel adjacent the hub thereof having one end cooperating with said arm, and the helically-coiled expanding spring engaging the otherv end of said lever to hold it yieldingly in engagement with the end of said arm.

2. In a binding mechanism, the combina- IOO tion with the cam-wheel having the mutilated circular flange thereon, of the trip-stop shaft having the arm whose end coperates with said flange, the lever pivoted to said camwheel adjacent the hub thereof having one end coperating with said arm, a projection from said cam-wheel and an aperture therein, a rod passing through said aperture and the inner end of the lever, enlargements on the ends of said rod, and a helically-coiled expanding spring surrounding said rod and interposed between said projection and the enlargement on the end to hold the outer end of said lever yieldingly in engagement with the end of said arm.

3. In a binding mechanism, the combination with the cam-wheel having the mutilated circular flange thereon and a substantially radial flange on one portion thereof', of the tripstop shaft having the arm whose end coperates with said circular flange,the lever pivoted to said cam-wheel adjacent the hub thereof having one en d coperating with said arm and an aperture in the other end, an aperture in said radial flange adjacent the inner end of said lever, a bolt passing through said apertures, a helically-coiled expanding spring interposed between said flange and the head of the bolt, and a nut on the other end coperating with the end of the lever; substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE L. PHELPS'.

Witnesses:

J. E. E. MARKLEY, D. DAYDEN. 

